GA Man Shoots Stepson

The shooting happened shortly after 11 p.m. at a home in the 2500 block of Amelia Drive near Decatur, according to a news release from DeKalb police.Police said the 47-year-old victim, whose name has not been released, got into a verbal and physical altercation with his mother, and the man's stepfather intervened, producing a handgun and shooting his stepson in the chest.The stepson was pronounced dead at Grady Memorial Hospital.Charges are pending against the 58-year-old stepfather, whose name has also not been released.

I admit it's hard to tell from those scant details if the shooting could have been justified, unless you think of it like this. A fight between son and mother gets violent. The disrespectful son starts pushing the mother around, maybe calls her names, perhaps even hits her. Stepdad comes into the action blasting away.
I'd use the same criterion as for any supposed DGU. Was there lethal threat or not. In this case I doubt it, as I suppose the local authorities do. But I'm sure that won't stop some of our pro-gun apologists from coming to the man's defense.
What's your opinion? Please leave a comment.